<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        margin: 0;
        padding: 0;
      }
      body {
        background-color: #333;
      }
      .box {
        position: relative;
        width: 747px;
        height: 617px;
        background-image: url(./img/map.png);
        margin: 0 auto;
      }
      .bj {
        position: absolute;
        top: 227px;
        right: 192px;
        width: 8px;
        height: 8px;
      }
      .dotted {
        width: 100%;
        height: 100%;
        background-color: #09f;
        border-radius: 50%;
      }
      .bj div[class^="bowen"] {
        position: absolute;
        top: 0;
        left: 0;
        transform: translate(-50%,-50%);
        width: 100%;
        height: 100%;
        box-shadow: 0 0 12px #09f;
        border-radius: 50%;
        animation: big 1.2s linear infinite;
      }
       .bowen2 {
           animation-delay: 0.4s!important;
       }
       .bowen3 {
           animation-delay: 0.8s!important;
       }
      @keyframes big {
          0% {}
          70% {
             width: 40px;
             height: 40px;
          }
          100% {
              width: 70px;
              height: 70px;
          }
      }
    </style>
  </head>
  <body>
    <div class="box">
      <div class="bj">
        <div class="dotted"></div>
        <div class="bowen1"></div>
        <div class="bowen2"></div>
        <div class="bowen3"></div>
      </div>
    </div>
  </body>
</html>
